Improvement in cans for hermetically-sealed goods



O. 0. LANE. Gan for Hermetically-Sealed Goods.

No. 221,468. Patented Nov. 11,1879.

Witmesses UNITED STATES PATENT OFFICE.

CHARLES C. LANE, OF NEW WESTMINSTER, BRITISH COLUMBIA.

IMPROVEMENT IN CANS FOR HERMETlCALLY-SEALED GOODS.

Specification forming part of Letters Patent No. 221,468, dated November11, 1879; application filed April 11, 1879.

To all whom it may concern:

Be it known that I, CHARLES C. LANE, of New Westminster, BritishColumbia, have invented an Improvement in Cans for Hermetically-SealedGoods; and I hereby declare the following to be a full, clear, and exactdescription thereof.

My invention relates to an improvement in cans for hermetically-sealedgoods; and my improvements consist in a construction of the cover bywhich any confined air may pass outduring the process of soldering thecover on the can without danger of leaving an open space in the solderedportion.

This invention is more especially valuable where the cans are to besoldered in what is known as the mechanical bath. a

Figure l is a view of my supplemental cover.

- experienced in sealing the whole rim, as, while the can is beingrolled, air which is displaced H or expanded inside is apt to comethrough the space around the rim of the cover, thus forming blow-holes,and that place where the air comes through will not be soldered, butwill remain open. All cans which have this occur to them havetheircontents spoiled, not being hermetically sealed.

The object of my invention is to overcome this obstacle to perfectsealing.

To do this I form a supplemental inner cover, A, which is corrugated orcrimped radially, and has a depression, a, at its center, into which thecorrugations or grooves lead. This supplemental inner cover is laid intothe can C after filling, or, if desired, it may be attached to the outercover, B, which has its rim I) crimped on the can in the usual way, andin the center is formed a small hole, 0. This small hole is madeimmediately over the depression a in the supplemental cover, and, as thegrooves or corrugations b, all center at this depression, any air whichmay be in the can during the process of soldering, instead of escapingthrough the rim, will be directed toward the center and escape throughthe hole. The rim is accordingly always thoroughly soldered, there beingno air to blow through the soft solder. As soon as the can is removedfrom the bath, a small piece of solder is put over the hole 0 in thecover, and the can is thus hermetically sealed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

The supplemental cover A, having a central depression, a, and radialgrooves 12 b, in combination with the can C and perforated cover B, asset forth.

In witness whereof I have hereunto set my hand.

CHARLES C. LANE.

Witnesses:

GEO. H. STRONG, FRANK A. BROOKS.

